tolgacelik.net
Tolga Çelik
FullStack / Distributed Systems Developer | Java · Kubernetes · AWS | iGaming & High-Traffic Systems

What do you need?

Issue in your project?
I'll handle it.
System to build?
I build it.
Scale problem?
I solve it.
Bug hiding in the logs?
I find it.

No limits. Name it — I'll do it.

Tolga Çelik · Personal site
Distributed-systems developer

I keep high-traffic systems running smoothly.

Platform · observability · alerting · feature work — end to end.

For the last six years I've held the technical ownership of a multiplayer board-game platform serving 10,000+ concurrent users. In 2023 I owned and technically led its rebuild into a Kubernetes + AWS cloud-native architecture — 20+ microservices across Java, .NET, PHP, Python, Node.js and React.

JavaSpringKubernetesAWSIstioRedisRabbitMQNode.jsTypeScriptReact
Currently
LIVE
  • RoleTechnical owner · iGaming platform
  • LocationIstanbul, Türkiye (UTC+3)
  • StatusOpen to conversations
13+
Years
10k+
Peak CCU
20+
Services
— Arc

How I got here

  1. 2012–2019
    First seven years

    Multiple companies, multiple teams, multiple stacks. The period that built the end-to-end engineering foundation everything else stood on.

  2. 2020
    Technical ownership of a 10k+ CCU platform

    Took over the technical ownership of a multiplayer board-game platform serving 10,000+ concurrent users.

  3. 2023
    Cloud-native transformation

    Owned and technically led the rebuild from on-prem into Kubernetes + AWS across 20+ microservices.

  4. Now
    Running the platform, open to conversations

    Delivering features, keeping the system stable, and looking for the next interesting challenge.

01 · About

A bit about me

I've been writing software professionally since 2012. My strongest muscle is owning a large, noisy, business-critical system end to end — architecture, production stability, incident triage, and long-term technical sustainability.

The 2023 AWS migration wasn't a lift-and-shift. It was a full rebuild of a polyglot distributed platform — 20+ microservices across Java, .NET Core, PHP, Python, Node.js and React — reshaped into a cloud-native, Kubernetes + Istio architecture. The system is live on AWS today, and I still look after its architecture, stability, and evolution.

I care about readable code, solid standards, and documentation that ages well. Over the past year I've leaned on AI-assisted tools like Cursor and Claude Code to roughly 5× my delivery speed — and I think the line between "coding" and "product thinking" is getting healthier because of it.

02 · Expertise

What I reach for

System Architecture

Cloud-native, microservice-based systems on AWS + Kubernetes with Istio service mesh and Docker across the stack.

AWSKubernetesIstioDockerMicroservices
Backend

Java (Spring), C# (.NET Core), PHP (Laravel/Lumen), Python. High-performance data layer with MySQL, Redis (Pub/Sub, HashMap), RabbitMQ, Memcached.

JavaSpring.NETPHPPythonMySQLRedisRabbitMQ
Full-Stack

End-to-end web and mobile. TypeScript, Angular, Vue, React, Node.js, React Native.

TypeScriptReactVueAngularNode.jsReact Native
DevOps & Observability

CI/CD pipelines with Jenkins, version control with Git, and production error monitoring with Sentry.

JenkinsGitSentryCI/CD
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